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https://issues.apache.org/jira/browse/CALCITE-4620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17350719#comment-17350719
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Julian Hyde commented on CALCITE-4620:
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Thanks for the test case, [~swtalbot]! Please see proposed fix in
[julianhyde/4620-case-on|https://github.com/julianhyde/calcite/tree/4620-case-on].
> Join on CASE causes AssertionError in RelToSqlConverter
> -------------------------------------------------------
>
> Key: CALCITE-4620
> URL: https://issues.apache.org/jira/browse/CALCITE-4620
> Project: Calcite
> Issue Type: Bug
> Reporter: Steven Talbot
> Assignee: Julian Hyde
> Priority: Major
>
> Basically CALCITE-4610 but this time with a CASE WHEN.
> I can provide a repro test if needed, but any join with a condition like in
> that same test
> {code:java}
> CASE WHEN a = 'some_literal' THEN true ELSE c = 'some_other_literal' END{code}
> The CASE travels through the pipeline, and the RelToSqlConverter crashes on
> it in convertConditionToSqlNode.
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